this is an easy and basic derivative question.

云游方丈 · 2018-11-09 04:40:14Z

this is an easy and basic derivative question.简介

来源: 云游方丈于 2018-11-09 04:40:14 [档案] [博客] [旧帖] [给我悄悄话] 本文已被阅读：次 (1462 bytes)

回答: 题目如下由 nanbudao 于 2018-11-04 08:33:45

This is an easy and basic derivative question.

k'(x) =((f(x))^-1)'

= -(f(x))^-2*f'(x)

so:

k'(2)= - (f(2))^-2 * f'(2)

=-4^-2 * (4.3-4)/(2.1-2)

= -9/16

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